The party’s prospects are in question if it fails to win over the “Brexit capital” in Thursday's by-election.
The support of the perennial candidate for President will boost Macron's morale but won't transform his electoral standing.
Labour face a tricky task in holding onto the seat.
The knife-edge by-election could end 82 years of Labour rule on the West Cumbrian coast.
Macron is the frontrunner, but he remains vulnerable to an upset.
Labour are the favourites, but they could fall victim to a shock in the Midlands constituency.
Can Ukip's Paul Nuttall achieve a breakthrough?
“Political tourist” Paul Nuttall of Ukip is taking on an uninspiring Labour campaign (with a Remainer candidate) in an area where 69 per cent voted Leave.
The pundits rate his chances at winning the French presidency as even smaller than his stature, but Little Ben may have a big role to play yet.
It is Emmanuel Macron who has the most to gain.
No country has ever left the EU before, so there's no map for where we're going.
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